I may be reading the question wrongly, but my take on it is as follows.
My reading of the question is - how many people out of the 100 do not fall under any of the classifications mentioned in the question?
Out of the 100% population:
40% graduated from High School X [A]
65% graduated from College Y [B]
30% live in City Z [C]
This constitutes 85% of the population.
Quote:
A + B + C - A*B - B*C - A*C + A*B*C
Therefore the portion of the population which "
did not graduate from High School X, did not graduate from College Y, and do not live in City Z" is the remaining population, which is 15% or 15 individuals out of the population of 100.
Imho the answer is B.
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Uh uh. I know what you're thinking. "Is the answer A, B, C, D or E?" Well to tell you the truth in all this excitement I kinda lost track myself. But you've gotta ask yourself one question: "Do I feel lucky?" Well, do ya, punk?